Answer:
The excited state electron configuration of an atom indicates the promotion of a valence electron to a higher energy state.
We have mass. Anything that generally includes atoms is matter
Because magnesium loses its electrons easily than aluminum
Helium only possesses two valence electrons, while the other noble gasses posses eight
The correct answer would be the first option. The arrows 1, 2 and 3 represent the phase transitions where heat energy is gained. As heat energy is gained the kinetic energy of the molecules in a substance is increased which would cause them to change phases from solid to liquid and to gas.
